Remove provenance APIs and provstor cache (SYN-4465)

[vEpiphyte]

• Remove provenance APIs and provstor cache. Does not remove any existing slabs on disk.
• Does not remote the runtime recursion protections

[codecov]

Codecov Report

Base: 97.21% // Head: 97.06% // Decreases project coverage by -0.16% ⚠️

Coverage data is based on head (3bc7fce) compared to base (75dd8b5).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2995      +/-   ##
==========================================
- Coverage   97.21%   97.06%   -0.16%     
==========================================
  Files         218      218              
  Lines       43204    43120      -84     
==========================================
- Hits        42002    41853     -149     
- Misses       1202     1267      +65     

Flag	Coverage Δ
linux	97.06% <100.00%> (-0.06%)	⬇️
linux_replay	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
synapse/cmds/cortex.py	97.92% <ø> (-0.70%)	⬇️
synapse/cortex.py	96.72% <ø> (-0.51%)	⬇️
synapse/lib/provenance.py	87.30% <ø> (-11.86%)	⬇️
synapse/lib/snap.py	94.84% <ø> (-0.04%)	⬇️
synapse/tests/utils.py	94.46% <ø> (-1.89%)	⬇️
synapse/lib/rstorm.py	99.42% <100.00%> (ø)
synapse/lib/slabseqn.py	96.17% <0.00%> (-2.19%)	⬇️
... and 9 more

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[Cisphyx]

Do we still need the ProvStack stuff for anything besides tracking recursion? Seems like we could clean it up a bit if that's all we're using it for but I suppose that can be a different story.

[vEpiphyte]

@Cisphyx Current story was scoped to removing the ongoing storage and APIs, not redoing the recursion protections.