ci: add 3.x validate container build and cleanup

[adrianreber]

Add build-3x and publish-3x jobs to build validate containers from the 3.x branch, including leap alongside almalinux and openeuler. Images are tagged with 3.x instead of latest. Add ohpc-validate-leap cleanup step to the cleanup workflow.

[github-actions]

🚀 CCache Statistics

Configuration	🐧 RHEL	🦊 openEuler
🖥️ x86_64 / gnu15	🟢 71.11%	🟢 71.11%
🖥️ x86_64 / intel	🟢 68.52%	-
💪 aarch64 / gnu15	🟢 71.11%	🟢 71.11%

📊 Detailed Statistics

openEuler (aarch64)

Cacheable calls:     45 /  93 (48.39%)
  Hits:              32 /  45 (71.11%)
    Direct:          32 /  32 (100.0%)
    Preprocessed:     0 /  32 ( 0.00%)
  Misses:            13 /  45 (28.89%)
Uncacheable calls:   48 /  93 (51.61%)
Local storage:
  Cache size (GiB): 0.0 / 5.0 ( 0.00%)
  Hits:              32 /  45 (71.11%)
  Misses:            13 /  45 (28.89%)

openEuler (x86_64)

Cacheable calls:     45 /  93 (48.39%)
  Hits:              32 /  45 (71.11%)
    Direct:          32 /  32 (100.0%)
    Preprocessed:     0 /  32 ( 0.00%)
  Misses:            13 /  45 (28.89%)
Uncacheable calls:   48 /  93 (51.61%)
Local storage:
  Cache size (GiB): 0.0 / 5.0 ( 0.00%)
  Hits:              32 /  45 (71.11%)
  Misses:            13 /  45 (28.89%)

RHEL (aarch64/gnu15)

Cacheable calls:     45 /  93 (48.39%)
  Hits:              32 /  45 (71.11%)
    Direct:          32 /  32 (100.0%)
    Preprocessed:     0 /  32 ( 0.00%)
  Misses:            13 /  45 (28.89%)
Uncacheable calls:   48 /  93 (51.61%)
Local storage:
  Cache size (GiB): 0.0 / 5.0 ( 0.00%)
  Hits:              32 /  45 (71.11%)
  Misses:            13 /  45 (28.89%)

RHEL (x86_64/gnu15)

Cacheable calls:     45 /  93 (48.39%)
  Hits:              32 /  45 (71.11%)
    Direct:          32 /  32 (100.0%)
    Preprocessed:     0 /  32 ( 0.00%)
  Misses:            13 /  45 (28.89%)
Uncacheable calls:   48 /  93 (51.61%)
Local storage:
  Cache size (GiB): 0.0 / 5.0 ( 0.00%)
  Hits:              32 /  45 (71.11%)
  Misses:            13 /  45 (28.89%)

RHEL (x86_64/intel)

Cacheable calls:     54 / 237 (22.78%)
  Hits:              37 /  54 (68.52%)
    Direct:          37 /  37 (100.0%)
    Preprocessed:     0 /  37 ( 0.00%)
  Misses:            17 /  54 (31.48%)
Uncacheable calls:  183 / 237 (77.22%)
Local storage:
  Cache size (GiB): 0.0 / 5.0 ( 0.00%)
  Hits:              37 /  54 (68.52%)
  Misses:            17 /  54 (31.48%)

---

🤖 Generated from workflow run 24994583244

[github-actions]

Test Results

 29 files  ±0  29 suites  ±0   50s ⏱️ +7s
 59 tests ±0  53 ✅ ±0  6 💤 ±0  0 ❌ ±0 
105 runs  ±0  97 ✅ ±0  8 💤 ±0  0 ❌ ±0 

Results for commit 7fdcd31. ± Comparison against base commit 27c5e08.