Pass Powershell scripts as a file to shell executor

Closes #27842 and #27830

See merge request gitlab-org/gitlab-runner!2874

Tests #27842

Fixes regression where each line of code was executed in its own
pipeline as if in a REPL

Merge branch '27844-runner-13-12-pwsh-unicode-can-cause-a-source-sequence-is-illegal-malformed-utf-8-500-error-in' into 'master'

Add utf-8 invalid replacement encoder to trace transformers

Closes #27844

See merge request !2881

Support git strategy with kubernetes executor

Closes #3847

See merge request !2862

Revert "Publish Windows helper image :latest tags"

See merge request !2880

This reverts commit d00c67c2.

Use Powershell for resolving paths

See merge request !2836

Allow whole Vault Secret configuration to be variable-expandable

Closes gitlab#301063

See merge request !2772

Use latest docs linting images for testing

See merge request !2877

Changed ${arch} to $(arch)

Closes gitlab#327605

See merge request !2875

Add new eval execution strategy for capturing exit code

Closes #27668

See merge request !2818

Change the implementation to support a specific builds_dir. We only mount repo if builds_dir doesn't already have a volume at the path specified in the config

Improve trace masking performance

Closes #16705

See merge request !2863

Ensure Docker client is in experimental mode

See merge request !2870

Fix TOML syntax in Kubernetes documentation

Closes #27772

See merge request !2872

Clarify, N-to-M relationship of Runners to GitLab instances

See merge request gitlab-org/gitlab-runner!2788