chore: move versioning outside the main package

[vgonkivs]

Overview

Move version flags outside the main package in order to have an access to them

./build/celestia version
Semantic version: v0.11.0-rc1-73-g509b74b9
Commit: 509b74b90bc6b3bf86f4730943abd3840430b03a
Build Date: Wed Jul 12 20:45:36 EEST 2023
System version: amd64/darwin
Golang version: go1.20.3

Checklist

• New and updated code has appropriate documentation
• New and updated code has new and/or updated testing
• Required CI checks are passing
• Visual proof for any user facing features like CLI or documentation updates
• Linked issues closed with keywords

[codecov-commenter]

Codecov Report

Merging #2468 (2f3e12a) into main (11dced4) will decrease coverage by 0.05%.
The diff coverage is 14.28%.

@@            Coverage Diff             @@
##             main    #2468      +/-   ##
==========================================
- Coverage   52.88%   52.83%   -0.05%     
==========================================
  Files         156      156              
  Lines        9971     9966       -5     
==========================================
- Hits         5273     5266       -7     
- Misses       4236     4237       +1     
- Partials      462      463       +1     

Impacted Files	Coverage Δ
cmd/celestia/util.go	56.52% <ø> (-5.02%)	⬇️
cmd/celestia/version.go	0.00% <0.00%> (ø)
nodebuilder/settings.go	64.28% <100.00%> (ø)

... and 7 files with indirect coverage changes