Add a gas/s metric for gas consuming endpoints

[natanasow]

Description:

Currently, we capture the HBAR spent on gas-consuming calls but we don't capture the actual gas

Note: This may require a mirror node call to view contract results for "Gas Used"
Note 2: Contract calls do not emit records so it's difficult to capture gas used in that case.
Note 3: gas charged = 0.8 * gas limit. Also gas charged >= gas burnt. Example from Danno. "If I did a 35k gas defi trade, the gas limit at 300k, the gas used will be 240k. We should call this "gas charged" even though the EVM only used 35k, "gas burnt."..."

Related issue(s):

Fixes #876

Notes for reviewer:

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[codecov-commenter]

Codecov Report

Patch coverage: 41.17% and project coverage change: -0.16 ⚠️

Comparison is base (9d06877) 74.40% compared to head (d44bd57) 74.24%.

❗ Current head d44bd57 differs from pull request most recent head d725f80. Consider uploading reports for the commit d725f80 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #939      +/-   ##
==========================================
- Coverage   74.40%   74.24%   -0.16%     
==========================================
  Files          28       28              
  Lines        1891     1899       +8     
  Branches      356      360       +4     
==========================================
+ Hits         1407     1410       +3     
- Misses        381      386       +5     
  Partials      103      103              

Impacted Files	Coverage Δ
packages/relay/src/lib/clients/sdkClient.ts	21.25% <41.17%> (+0.65%)	⬆️

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[Nana-EC]

Please add a description

[Nana-EC]

Per other suggestions let's make this clean and have a separate metric.
Preserve the same labels as i believe they are applicable

[Nana-EC]

Looking good, removing block.
Left some final suggestions.
Please get @AlfredoG87 additional sign off before merging.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[AlfredoG87]

LGTM 👍

Thank you for addressing all the comments 💯