feat: add storage.total_limit_size support to http output

[JeelDasvani]

What this PR does

Adds storage.total_limit_size support to the HTTP output plugin, allowing users to configure disk-based buffering limits through Kubernetes manifests.

Fixes #1852

Changes

• Added TotalLimitSize field to the HTTP output struct in http_types.go
• Added storage.total_limit_size config rendering in the Params() method
• Added unit test (http_types_test.go) verifying correct rendering
• Regenerated CRDs via make manifests
• Regenerated DeepCopy via make generate
• Regenerated docs via go run ./cmd/doc-gen/main.go

Pattern

This follows the exact same pattern already used in 6 other output plugins:

• Elasticsearch
• OpenTelemetry
• Syslog
• Loki
• Kafka
• OpenSearch

Testing

• go vet — clean
• go test ./apis/fluentbit/v1alpha2/... -v — all 12 tests pass
• CRD YAMLs verified to contain totalLimitSize under the HTTP output spec
• Docs verified to include the new field

Example usage

apiVersion: fluentbit.fluent.io/v1alpha2
kind: ClusterOutput
metadata:
  name: http-output
spec:
  match: "*"
  http:
    host: example.com
    port: 443
    uri: /logs
    format: json
    totalLimitSize: "512M"

[JeelDasvani]

Hey @joshuabaird , looks like 7 workflows are awaiting approval to run.
Could you please review and approve them so CI can complete?

[joshuabaird]

Thanks for your contribution, @JeelDasvani!

[JeelDasvani]

Thanks @joshuabaird for the review and for merging the PR. happy to contribute and looking forward to helping more with the project.