Update bug fix issue template

[ChrisCummins]

• Remove conda from the list of installation sources (we don't have a conda package)
• Port collect_env.py from PyTorch repo to this repo.
• Adapt collect_env.py for CompilerGym by removing irrelevant CUDA / PyTorch dependencies.

[codecov-commenter]

Codecov Report

Merging #676 (96ee4ca) into development (63dbfac) will decrease coverage by 0.06%. The diff coverage is 100.00%.

@@               Coverage Diff               @@
##           development     #676      +/-   ##
===============================================
- Coverage        88.36%   88.30%   -0.07%     
===============================================
  Files              125      125              
  Lines             7565     7565              
===============================================
- Hits              6685     6680       -5     
- Misses             880      885       +5     

Impacted Files	Coverage Δ
compiler_gym/util/gym_type_hints.py	100.00% <100.00%> (ø)
...er_gym/third_party/inst2vec/inst2vec_preprocess.py	69.73% <0.00%> (-4.22%)	:arrow_down:
compiler_gym/util/commands.py	83.33% <0.00%> (-2.39%)	:arrow_down:
...loop_tool/service/loop_tool_compilation_session.py	88.51% <0.00%> (-1.36%)	:arrow_down:
compiler_gym/envs/llvm/datasets/cbench.py	80.50% <0.00%> (+1.08%)	:arrow_up:
compiler_gym/service/connection.py	80.84% <0.00%> (+1.94%)	:arrow_up:

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[ChrisCummins]

Many thanks for the review @dpacgopinath!