Get rid of executeV2, just replace execute

[benjie]

Description

This is a breaking change; it turns out that having both execute and executeV2 is super annoying, and the default executeV2 function that aimed to give backwards compatibility with execute was even broken... Not ideal. Rather than explaining to everyone that we have two methods, I've decided to just replace execute with executeV2 entirely. Anyone who has written a custom step class with an execute method will need to update it; but doing so is straightforward - you just need to destructure the argument and add a line of code to the top of the function that converts the new values tuple to be in the same format as the legacy values tuple:

- async execute(count: number, values: any[][], extra: ExecutionExtra) {
+ async execute({ count, values: newValues, extra }: ExecutionDetails) {
+   const values = newValues.map((dep) =>
+     dep.isBatch ? dep.entries : new Array(count).fill(dep.value)
+   );
    // REST OF YOUR FUNCTION HERE
  }

Performance impact

An improvement that is unlikely to be measurable.

Security impact

Less surface area: better security.

Checklist

• My code matches the project's code style and yarn lint:fix passes.
• I've added tests for the new feature, and yarn test passes.
• I have detailed the new feature in the relevant documentation.
• I have added this feature to 'Pending' in the RELEASE_NOTES.md file (if one exists).
• If this is a breaking change I've explained why.

[changeset-bot]

🦋 Changeset detected

Latest commit: 288fe76

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

This PR includes changesets to release 15 packages

Name	Type
@dataplan/json	Patch
@dataplan/pg	Patch
grafast	Patch
pgl	Patch
postgraphile	Patch
graphile-build-pg	Patch
graphile-utils	Patch
@localrepo/grafast-bench	Patch
@grafserv/persisted	Patch
grafserv	Patch
ruru-components	Patch
@localrepo/grafast-website	Patch
graphile-build	Patch
graphile-export	Patch
graphile	Patch

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