fix: dbrp correct json output

[devanbenz]

Fixes json output for dbrp, previously we had a plaintext header, this just outputs json:

example w/ jq usage (this would fail previously)

> ./bin/darwin/arm64/influx v1 dbrp list --json | jq '.[] | {database, bucketID}'

{
  "database": "_monitoring",
  "bucketID": "45401d2924820280"
}
{
  "database": "_tasks",
  "bucketID": "26718fb6c27103ad"
}
{
  "database": "bucket1",
  "bucketID": "b2d96a0fe6613f35"
}
{
  "database": "bucket1",
  "bucketID": "55d7cf89e217cf37"
}
{
  "database": "test",
  "bucketID": "720a8dfe9a01323f"
}

closes: influxdata/influxdb#24485

[Copilot]

Pull request overview

Fixes --json output for the v1 DBRP list command so it emits valid JSON (single JSON array) instead of interleaving JSON with human-readable section headers (per influxdb issue #24485).

Changes:

• Update Client.List to return early with a single PrintJSON(...) when PrintAsJSON is enabled.
• Add a regression test that asserts List JSON output is valid JSON and contains the expected DBRPs.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
clients/v1_dbrps/v1_dbrps.go	Ensures JSON mode prints a single JSON array and avoids printing the virtual/physical section headers.
clients/v1_dbrps/v1_dbrps_test.go	Adds a JSON-focused test validating the list output is parseable JSON with expected entries.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

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[davidby-influx]

LGTM