added method-style rule for eslint

[rsun19]

Closes: RHOAIENG-4721

Description

Set this eslint rule: "@typescript-eslint/method-signature-style": "error" to have consistency for interface functions. The standard we're trying to achieve is func: (arg: type) => type;

details: https://issues.redhat.com/browse/RHOAIENG-4721

How Has This Been Tested?

npm run test:lint

Request review criteria:

Self checklist (all need to be checked):

• The developer has manually tested the changes and verified that the changes work
• Commits have been squashed into descriptive, self-contained units of work (e.g. 'WIP' and 'Implements feedback' style messages have been removed)
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).

After the PR is posted & before it merges:

• The developer has tested their solution on a cluster by using the image produced by the PR to main

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.15%. Comparing base (20d32e9) to head (5e0d880).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2869   +/-   ##
=======================================
  Coverage   78.14%   78.15%           
=======================================
  Files        1101     1101           
  Lines       23421    23421           
  Branches     5902     5902           
=======================================
+ Hits        18303    18305    +2     
+ Misses       5118     5116    -2     

see 3 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 20d32e9...5e0d880. Read the comment docs.

[christianvogt]

/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: christianvogt, gitdallas

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• frontend/OWNERS [christianvogt]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[rsun19]

Sorry, resolved merge conflicts

[christianvogt]

/lgtm