feat: Git sync - add first class support for CAs

[adwk67]

Important

Requires stackabletech/operator-rs#1154 to be merged and the reference to be updated here: https://github.com/stackabletech/airflow-operator/pull/750/changes#diff-2e9d962a08321605940b5a657135052fbcef87b5e360662bb527c96d9a615542R37 Done 9f09120

Re-tested after op-rs bump:

--- PASS: kuttl (396.51s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/ca-cert_airflow-latest-3.1.6_openshift-false (395.73s)
PASS

On Openshift, having switched to unprivileged nginx:

--- PASS: kuttl (170.84s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/ca-cert_airflow-latest-3.1.6_openshift-true (160.66s)
PASS

Description

Part of stackabletech/issues#820

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
• Please make sure all these things are done and tick the boxes

Author

• Changes are OpenShift compatible
• CRD changes approved
• CRD documentation for all fields, following the style guide.
• Helm chart can be installed and deployed operator works
• Integration tests passed (for non trivial changes)
• Changes need to be "offline" compatible
• Links to generated (nightly) docs added
• Release note snippet added

Reviewer

• Code contains useful comments
• Code contains useful logging statements
• (Integration-)Test cases added
• Documentation added or updated. Follows the style guide.
• Changelog updated
• Cargo.toml only contains references to git tags (not specific commits or branches)

Acceptance

• Feature Tracker has been updated
• Proper release label has been added
• Links to generated (nightly) docs added
• Release note snippet added
• Add type/deprecation label & add to the deprecation schedule
• Add type/experimental label & add to the experimental features tracker

[razvan]

lgtm

[adwk67]

Release notes snippet

The airflow operator now allows users to specify CA-certs when using gitsync commands.

[razvan]

lgtm