Setting up bor to use hosted 18.04 runner as ubuntu provided 18.04 runner is end of life

[cffls]

Description

Setting up bor to use hosted 18.04 runner as ubuntu provided 18.04 runner is end of life

Changes

• Bugfix (non-breaking change that solves an issue)
• Hotfix (change that solves an urgent issue, and requires immediate attention)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)
• Changes only for a subset of nodes

Breaking changes

Please complete this section if any breaking changes have been made, otherwise delete it

Nodes audience

In case this PR includes changes that must be applied only to a subset of nodes, please specify how you handled it (e.g. by adding a flag with a default value...)

Checklist

• I have added at least 2 reviewer or the whole pos-v1 team
• I have added sufficient documentation in code
• I will be resolving comments - if any - by pushing each fix in a separate commit and linking the commit hash in the comment reply

Cross repository changes

• This PR requires changes to heimdall
  • In case link the PR here:
• This PR requires changes to matic-cli
  • In case link the PR here:

Testing

• I have added unit tests
• I have added tests to CI
• I have tested this code manually on local environment
• I have tested this code manually on remote devnet using express-cli
• I have tested this code manually on mumbai
• I have created new e2e tests into express-cli

Manual tests

Please complete this section with the steps you performed if you ran manual tests for this functionality, otherwise delete it

Additional comments

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[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.02 ⚠️

Comparison is base (ac774c2) 56.80% compared to head (6de2a49) 56.78%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #812      +/-   ##
==========================================
- Coverage   56.80%   56.78%   -0.02%     
==========================================
  Files         611      611              
  Lines       71390    71390              
==========================================
- Hits        40551    40539      -12     
- Misses      27381    27394      +13     
+ Partials     3458     3457       -1     

see 20 files with indirect coverage changes

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