fix(git): Fixes Git when using auth or fetch. Fixes #2343

[alexec]

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
• The title of the PR is (a) conventional, (b) states what changed, and (c) suffixes the related issues number. E.g. "fix(controller): Updates such and such. Fixes #1234".
• I've signed the CLA.
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My builds are green. Try syncing with master if they are not.
• My organization is added to USERS.md.

Fixes #2343
See #3246

Changes

• Write SSH private key to a temp file rather than ~/.ssh/id_rsa so we don't delete my keys while testing 😡
• Add support for authentication when used with fetch or revision.

[sonarcloud]

SonarCloud Quality Gate failed.

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
3 Code Smells

0.0% Coverage
0.0% Duplication

[sarabala1979]

Code LGMT