chore: update all relevant go.mod's to Go 1.18

[technicallyty]

Description

• updates all go.mod's to use 1.18 (sans x/group).

Closes: #1082

---

Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.

I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[codecov]

Codecov Report

Merging #1088 (7d2be1d) into master (cfd8d1d) will increase coverage by 6.27%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1088      +/-   ##
==========================================
+ Coverage   61.72%   67.99%   +6.27%     
==========================================
  Files         203      206       +3     
  Lines       18953    20839    +1886     
==========================================
+ Hits        11699    14170    +2471     
+ Misses       6012     5358     -654     
- Partials     1242     1311      +69     

Flag	Coverage Δ
experimental-codecov	67.88% <ø> (?)
stable-codecov	61.74% <ø> (+0.02%)	⬆️

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[aleem1314]

Let's also update the go version in GitHub actions.

[aleem1314]

Pre approving