Update version to v1.17.8

[willhickey]

Nothing in this commit except the version bump:

$ glol -1
d6f1d51872 2023-11-30 17:54:09 -0600  (HEAD -> version_bump_v1.17.8, origin/version_bump_v1.17.8)  will.hickey@solana.com Update version to v1.17.8
$ git diff v1.17..HEAD | grep -vE "^ |^@@ |^--- |^\+\+\+ |^index |^diff |^-( \")?solana.*1.17.7|^\+( \")?solana.*1.17.8|^-version|^\+version"
$

[codecov]

Codecov Report

Merging #34293 (d6f1d51) into v1.17 (fca44b7) will increase coverage by 0.0%.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##            v1.17   #34293   +/-   ##
=======================================
  Coverage    81.8%    81.8%           
=======================================
  Files         803      803           
  Lines      218075   218075           
=======================================
+ Hits       178503   178525   +22     
+ Misses      39572    39550   -22     

[AshwinSekar]

LGTM just looks like a rename from 7 -> 8