fix: fetch stable version

[AlexD10S]

This PR addresses the sorting issue identified in: #325 where versioned tags were prioritized over stable2409 in the pop up parachain process.

Changes

• Updated the logic to use this improved sorting approach for fetching both relay and parachain binaries.
• Moved the parse_latest_tag method, which identifies the latest version by prioritizing stable-format tags, into a helper module. It was used to fetch templates, now is used for fetching relay and parachain binaries too.

[evilrobot-01]

Looks good apart from the use of 'helpers'. Its highly subjective, but my view is that using 'helpers' does nothing for discoverability of code and therefore fails in terms of devex for the crate consumer. Modules can be descriptive and expressive.

[codecov]

Codecov Report

Attention: Patch coverage is 94.73684% with 6 lines in your changes missing coverage. Please review.

Project coverage is 70.35%. Comparing base (2af82eb) to head (6a7e033).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/pop-common/src/polkadot_sdk.rs	95.00%	0 Missing and 5 partials ⚠️
crates/pop-parachains/src/up/parachains.rs	66.66%	0 Missing and 1 partial ⚠️

@@            Coverage Diff             @@
##             main     #328      +/-   ##
==========================================
+ Coverage   70.33%   70.35%   +0.02%     
==========================================
  Files          53       54       +1     
  Lines        9098     9105       +7     
  Branches     9098     9105       +7     
==========================================
+ Hits         6399     6406       +7     
  Misses       1718     1718              
  Partials      981      981              

Files with missing lines	Coverage Δ
crates/pop-common/src/git.rs	71.10% <100.00%> (-5.23%)	⬇️
crates/pop-common/src/lib.rs	61.29% <ø> (ø)
crates/pop-common/src/sourcing/binary.rs	92.30% <100.00%> (+0.02%)	⬆️
crates/pop-parachains/src/up/chain_specs.rs	83.03% <ø> (ø)
crates/pop-parachains/src/up/relay.rs	85.93% <100.00%> (+0.33%)	⬆️
crates/pop-parachains/src/up/parachains.rs	86.38% <66.66%> (+0.14%)	⬆️
crates/pop-common/src/polkadot_sdk.rs	95.00% <95.00%> (ø)

[al3mart]

Couldn't point out anything. Nice one!

[evilrobot-01]

LGTM, thank you!