Estimator: print trainer parameters to stdout

[chongxiaoc]

For torch and keras trainer. Lightning trainer has already supported.

Signed-off-by: Chongxiao Cao chongxiaoc@uber.com

Checklist before submitting

• Did you read the contributor guide?
• Did you update the docs?
• Did you write any tests to validate this change?
• Did you update the CHANGELOG, if this change affects users?

Description

Fixes # (issue).

Review process to land

1. All tests and other checks must succeed.
2. At least one member of the technical steering committee must review and approve.
3. If any member of the technical steering committee requests changes, they must be addressed.

[github-actions]

Unit Test Results

     797 files  ±0       797 suites  ±0   6h 44m 58s ⏱️ ±0s
     629 tests ±0       584 ✔️ ±0       42 💤 ±0  3 ❌ ±0 
15 903 runs  ±0  12 250 ✔️ ±0  3 650 💤 ±0  3 ❌ ±0 

For more details on these failures, see this check.

Results for commit e36774e. ± Comparison against base commit e36774e.