[web3.js] Eliminate dependency on URL class

[steveluscher]

Problem

The URL class is not available in all runtimes, namely React Native. For this, web3.js currently depends on a polyfill.

Thing is, our use of URL is very constrained:

• Determine if a URL is valid
• Determine if a URL starts with https:
• Parse the port number out of a URL and modify it

I'm all for relying on built-ins, but when the built-in doesn't exist on a target platform, it's worth taking a look at whether you can get away with a minimal implementation of it rather than a full polyfill.

Summary of Changes

• Eliminate the dependency on the URL class in favor of purpose-built userspace implementations of URL parsing.
• Remove React Native URL polyfill and regenerate lockfiles

Test plan

• Search for new URL in src/; no more uses.

Addresses solana-foundation/solana-web3.js#1103
Closes: #27001

[codecov]

Codecov Report

Merging #27349 (e6df162) into master (e779032) will decrease coverage by 0.1%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   solana-labs/solana#27349     +/-   ##
=========================================
- Coverage    76.9%    76.8%   -0.2%     
=========================================
  Files          48       47      -1     
  Lines        2505     2507      +2     
  Branches      355      359      +4     
=========================================
- Hits         1927     1926      -1     
- Misses        448      452      +4     
+ Partials      130      129      -1     

[jordaaash]

Sorry for the late review. Looks good, it's nice to kill that polyfill.