RFC: Tezt: compute peak memory usage per test

Context

Adds a few scripts for computing peak memory usage for tezt tests, using cgmemtime. The peak memory consumption recursively includes all processes launched by the test.

This requires cgmemtime, a Linux kernel >= 5.19 and csvkit:

./tezt_cgmemtime_all.sh | tee tezt_cgmemtime_all.csv # This will run all tezt, which will take a long time (~8hrs on my comp). Memory consumption results are written to stdout.
./tezt_cgmemtime_import.sh tezt_cgmemtime_all.csv # Imports the CSV file into the sqlite3 database tezt_cgmemtime_all.db for convenient processing
N=20 ./tezt_cgmemtime_top_pigs.sh tezt_cgmemtime_all.db # Prints the 20 most memory hungry tezts.

In the second commit, I also add the results for running the script on top of 1f11961a on master

Here are the 20 most memory hungry tezts from those results. Pointy haired manager might also browsing the results as a Google Spreadsheet:

Largest test consumers in terms of CHILD_RSS_HIGH:

title                                                                                                               child_rss_high_mb
------------------------------------------------------------------------------------------------------------------  -----------------
FuzzRef: List (List.concat_map)                                                                                     1531.234375      
test lib scoru wasm: Durable snapshot (Uniformly distributed all operations. Initial size: 2000, 20000 operations)  1308.5859375     
test lib scoru-wasm-fast: Memory access (load_bytes behaves the same on both memory implementations)                1257.79296875    
test lib scoru wasm: WASM Encodings (Input and output buffers trees)                                                1008.26171875    
tezos-crypto-shaX-props: SHA512_Props (SHA512_incremental_list)                                                     998.68359375     
test lib scoru wasm: Output (Output buffer)                                                                         978.4296875      
test lib scoru-wasm-fast: Memory access (store_num behaves the same on both memory implementations)                 936.609375       
016-PtMumbai: Refutation_game: Refutation (Perfect against Info per level hater)                                    902.83984375     
017-PtNairob: Refutation_game: Refutation (Perfect against Info per level hater)                                    897.89453125     
alpha: Refutation_game: Refutation (Perfect against Info per level hater)                                           897.625          
test lib scoru-wasm-fast: Memory access (store_bytes behaves the same on both memory implementations)               893.828125       
017-PtNairob: interpretation (lambda_rec instruction with an infinite recursion)                                    859.8359375      
016-PtMumbai: interpretation (lambda_rec instruction with an infinite recursion)                                    859.8046875      
alpha: interpretation (lambda_rec instruction with an infinite recursion)                                           859.18359375     
octez-codec dump encodings                                                                                          821.62890625     
017-PtNairob: proxy ([fst (split_key s)] is a prefix of [s])                                                        820.9609375      
tezos-crypto-shaX-props: SHA256_Props (SHA256_incremental_list)                                                     807.41015625     
tezos-layer2-store: indexed-store-pbt (indexable store (parallel))                                                  703.75           
test lib scoru wasm: Durable snapshot (Descending distributed all operations. Initial size: 2000, 3000 operations)  689.2109375      
test lib scoru wasm: Durable snapshot (Stress-test operation write_value_exn. Initial size: 1000, 2000 operations)  680.08203125     

Largest test consumers in terms of GROUP_MEM_HIGH:

title                                        group_mem_high_mb
-------------------------------------------  -----------------
p2p-swap-disable                             4424.44921875    
Mumbai: bootstrap: many nodes bootstrap      3946.23046875    
Nairobi: bootstrap: many nodes bootstrap     3943.83984375    
Alpha: bootstrap: many nodes bootstrap       3942.41796875    
p2p-maintenance-init-expected_connections    3664.5390625     
Nairobi: storage snapshot export and import  3008.0859375     
Mumbai: storage snapshot export and import   3002.046875      
Alpha: storage snapshot export and import    2930.01171875    
Nairobi: forge block with wrong payload      2408.90234375    
Mumbai: forge block with wrong payload       2395.34765625    
Alpha: forge block with wrong payload        2393.75          
Nairobi: forge fake block                    2363.9296875     
Mumbai: forge fake block                     2363.63671875    
Alpha: forge fake block                      2363.43359375    
Alpha: Nonce seed revelation                 2362.3359375     
Mumbai: Nonce seed revelation                2353.12109375    
Nairobi: Nonce seed revelation               2351.125         
Test [octez-admin-client p2p stat]           2347.13671875    
Nairobi: check synchronization state         2269.78125       
Alpha: check synchronization state           2253.53125       

Manually testing the MR

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
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