[service] Reduce severity of logging messages on reset() retry.

[ChrisCummins]

If env.reset() fails, log the error that we are recovering from, but treat ServiceIsClosed errors as unimportant since we know what causes them.

[codecov-commenter]

Codecov Report

Merging #602 (b11c5f0) into development (d5d60b6) will decrease coverage by 0.04%.
The diff coverage is 97.95%.

❗ Current head b11c5f0 differs from pull request most recent head 9a48937. Consider uploading reports for the commit 9a48937 to get more accurate results

@@               Coverage Diff               @@
##           development     #602      +/-   ##
===============================================
- Coverage        88.26%   88.22%   -0.05%     
===============================================
  Files              114      114              
  Lines             6708     6709       +1     
===============================================
- Hits              5921     5919       -2     
- Misses             787      790       +3     

Impacted Files	Coverage Δ
compiler_gym/envs/llvm/__init__.py	100.00% <ø> (ø)
compiler_gym/envs/llvm/llvm_env.py	88.18% <ø> (ø)
compiler_gym/service/proto/__init__.py	100.00% <ø> (ø)
compiler_gym/third_party/inst2vec/rgx_utils.py	86.53% <ø> (ø)
compiler_gym/service/connection.py	78.03% <75.00%> (ø)
compiler_gym/envs/compiler_env.py	91.85% <100.00%> (-0.48%)	⬇️
compiler_gym/envs/llvm/datasets/cbench.py	80.74% <100.00%> (ø)
compiler_gym/envs/llvm/datasets/csmith.py	86.84% <100.00%> (ø)
compiler_gym/envs/llvm/llvm_benchmark.py	93.43% <100.00%> (ø)
...ice/runtime/create_and_run_compiler_gym_service.py	100.00% <100.00%> (ø)
... and 9 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d5d60b6...9a48937. Read the comment docs.