chore(ci): add release-1.10 to nightly E2E test matrices

[rm3l]

Description

Add release-1.10 to the nightly E2E test matrices, similar to #2171 (which added release-1.9).

• Add release-1.10 to the branch matrix in the nightly E2E workflow
• Add release-1.10 to both from_branch and to_branch matrices in the nightly upgrade test workflow

Which issue(s) does this PR fix or relate to

• N/A

PR acceptance criteria

• Tests
• Documentation

How to test changes / Special notes to the reviewer

• Verify the nightly workflow includes release-1.10 in the matrix
• Verify the nightly upgrade test workflow includes release-1.10 in both from_branch and to_branch
• Invalid upgrade paths (same branch, downgrades) are still automatically skipped by the existing upgrade-path-checker step

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[rhdh-qodo-merge]

Review Summary by Qodo

Add release-1.10 to nightly E2E test matrices

✨ Enhancement

Walkthroughs

Description

• Add release-1.10 to nightly E2E test matrix
• Add release-1.10 to nightly upgrade test matrices
• Enables testing of release-1.10 branch in CI/CD pipelines

Diagram

flowchart LR
  nightly["nightly.yaml"]
  upgrade["nightly-upgrade-test.yaml"]
  matrix1["branch matrix"]
  matrix2["from_branch matrix"]
  matrix3["to_branch matrix"]
  r110["release-1.10"]
  
  nightly -- "add to" --> matrix1
  matrix1 -- "includes" --> r110
  upgrade -- "add to" --> matrix2
  upgrade -- "add to" --> matrix3
  matrix2 -- "includes" --> r110
  matrix3 -- "includes" --> r110

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File Changes

1. .github/workflows/nightly.yaml ⚙️ Configuration changes +1/-0

Add release-1.10 to nightly test matrix

• Added release-1.10 to the branch matrix
• Positioned between main and release-1.9 for consistent ordering
• Enables nightly tests to run against the release-1.10 branch

.github/workflows/nightly.yaml

---

2. .github/workflows/nightly-upgrade-test.yaml ⚙️ Configuration changes +2/-0

Add release-1.10 to upgrade test matrices

• Added release-1.10 to the from_branch matrix
• Added release-1.10 to the to_branch matrix
• Enables upgrade path testing for and to release-1.10
• Invalid upgrade paths are filtered by existing upgrade-path-checker step

.github/workflows/nightly-upgrade-test.yaml

---