build(deps): bump github.com/open-policy-agent/opa from 1.6.0 to 1.8.0

Bumps [github.com/open-policy-agent/opa](https://github.com/open-policy-agent/opa) from 1.6.0 to 1.8.0.
- [Release notes](https://github.com/open-policy-agent/opa/releases)
- [Changelog](https://github.com/open-policy-agent/opa/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-policy-agent/opa/compare/v1.6.0...v1.8.0)

---
updated-dependencies:
- dependency-name: github.com/open-policy-agent/opa
  dependency-version: 1.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/lestrrat-go/httprc/v3/errors.go

@@ -0,0 +1,57 @@
+package httprc
+
+import "errors"
+
+var errResourceAlreadyExists = errors.New(`resource already exists`)
+
+func ErrResourceAlreadyExists() error {
+	return errResourceAlreadyExists
+}
+
+var errAlreadyRunning = errors.New(`client is already running`)
+
+func ErrAlreadyRunning() error {
+	return errAlreadyRunning
+}
+
+var errResourceNotFound = errors.New(`resource not found`)
+
+func ErrResourceNotFound() error {
+	return errResourceNotFound
+}
+
+var errTransformerRequired = errors.New(`transformer is required`)
+
+func ErrTransformerRequired() error {
+	return errTransformerRequired
+}
+
+var errURLCannotBeEmpty = errors.New(`URL cannot be empty`)
+
+func ErrURLCannotBeEmpty() error {
+	return errURLCannotBeEmpty
+}
+
+var errUnexpectedStatusCode = errors.New(`unexpected status code`)
+
+func ErrUnexpectedStatusCode() error {
+	return errUnexpectedStatusCode
+}
+
+var errTransformerFailed = errors.New(`failed to transform response body`)
+
+func ErrTransformerFailed() error {
+	return errTransformerFailed
+}
+
+var errRecoveredFromPanic = errors.New(`recovered from panic`)
+
+func ErrRecoveredFromPanic() error {
+	return errRecoveredFromPanic
+}
+
+var errBlockedByWhitelist = errors.New(`blocked by whitelist`)
+
+func ErrBlockedByWhitelist() error {
+	return errBlockedByWhitelist
+}