upgrade to nodejs v18

[nionis]

Upgrades RPCh to work with nodejs 18

• upgrades all docker images to nodejs 18
• removes all uses of cross-fetch and node-fetch since nodejs 18 introduces global a fetch
• removes outdated & disabled funding functionality in DP
• removes nock testing library
• rewrite some tests
• update global typescript config to better match what nodejs18 offers
• introduce internal types/fetch package to provide fetch types across the monorepo

[nionis]

one blocker nock/nock#2397 - @esterlus how would you like to proceed?

[esterlus]

Remove nock and replace test occurances with real node servers or remove needlessly mocked tests.

[changeset-bot]

🦋 Changeset detected

Latest commit: d19e864

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 13 packages

Name	Type
@rpch/ethereum-provider	Minor
@rpch/availability-monitor	Minor
@rpch/discovery-platform	Minor
@rpch/funding-service	Minor
@types/fetch	Minor
@rpch/configs-typescript	Minor
@rpch/rpc-server	Minor
@rpch/common	Minor
@rpch/ethers	Minor
@rpch/exit-node	Minor
@rpch/manager	Minor
@rpch/sandbox	Minor
@rpch/sdk	Minor

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[esterlus]

Should be a minor release, as it is not compatible with the patch before

[esterlus]

Nice work,
one minor issue,
yarn format:fix fails because of devkit sandbox. I guess that was the same before.

And one minor request,
please apply this patch before landing:

diff --git a/.envrc b/.envrc
index 8700a1b..3550a30 100644
--- a/.envrc
+++ b/.envrc
@@ -1,2 +1 @@
-export NIXPKGS_ALLOW_INSECURE=1
 use flake