chore(config): migrate some remote config to Statsig and remove legacy configs

[kathaypacific]

Description

This PR removes some unused remote config configs, and replaces the following with statsig:

• wallet connect v2 enabled -> feature gate (note that feature gates always default to false, but we should default this value to true since then builders can access wallet connect without a statsig account, context)
• celo education url -> new item in app_config links

Note that the expanded pincode blocklist remote config flag doesn't actually exist in the remote config console - so it is always defaulting to false, so i've just removed the functionality.

Removed unused config:

• logPhoneNumberTypeEnabled
• pincodeUseExpandedBlocklist
• coinbasePayEnabled
• maxSwapSlippagePercentage
• networkTimeoutSeconds

Test plan

n/a

Related issues

• Related to RET-1272

Backwards compatibility

Y

Network scalability

If a new NetworkId and/or Network are added in the future, the changes in this PR will:

• Continue to work without code changes, OR trigger a compilation error (guaranteeing we find it when a new network is added)

[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 2 lines in your changes missing coverage. Please review.

Project coverage is 89.02%. Comparing base (d2e6558) to head (1bf5795).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
...ons/feed/detailContent/TransferReceivedContent.tsx	83.33%	1 Missing ⚠️
src/walletConnect/saga.ts	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6473      +/-   ##
==========================================
- Coverage   89.06%   89.02%   -0.05%     
==========================================
  Files         731      729       -2     
  Lines       31935    31871      -64     
  Branches     6149     6141       -8     
==========================================
- Hits        28444    28373      -71     
- Misses       3294     3300       +6     
- Partials      197      198       +1     

Files with missing lines	Coverage Δ
src/app/reducers.ts	26.82% <ø> (ø)
src/app/saga.ts	70.61% <ø> (ø)
src/app/selectors.ts	96.55% <ø> (-0.51%)	⬇️
src/firebase/firebase.ts	41.02% <ø> (+0.20%)	⬆️
src/firebase/remoteConfigValuesDefaults.ts	100.00% <ø> (ø)
src/navigator/SettingsMenu.tsx	95.00% <100.00%> (+0.05%)	⬆️
src/pincode/PincodeSet.tsx	94.39% <100.00%> (-0.21%)	⬇️
src/pincode/authentication.ts	87.24% <ø> (-0.78%)	⬇️
src/redux/migrations.ts	97.02% <100.00%> (+<0.01%)	⬆️
src/redux/store.ts	89.23% <ø> (ø)
... and 5 more

... and 19 files with indirect coverage changes

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[emerge-tools]

1 build decreased size

Name	Version	Download	Change	Install	Change	Approval
Celo (test) org.celo.mobile.test	1.103.0 (168)	25.4 MB	⬇️ 97.6 kB (-0.38%)	63.6 MB	⬇️ 142.0 kB (-0.22%)	N/A

Celo (test) 1.103.0 (168)
org.celo.mobile.test

⚖️ Compare build
📦 Install build
⏱️ Analyze build performance

Total install size change: ⬇️ 142.0 kB (-0.22%)
Total download size change: ⬇️ 97.6 kB (-0.38%)

Largest size changes

Item	Install Size Change
main.jsbundle	⬇️ -143.4 kB
RNSVGTSpan.getLinePath:context:	⬇️ -6.4 kB
Sentry.SentryReplayOptions.init(dictionary)	⬆️ 2.6 kB
RCTCxxMethod.invokeWithBridge:module:arguments:	⬇️ -2.5 kB
SentryOptions.validateOptions:didFailWithError:	⬇️ -2.5 kB

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Comment trigger: Size diff threshold of 100.00kB exceeded

[kathaypacific]

(The CI is not passing because the required statsig config has not been reviewed and committed yet)

[sviderock]

🚀