feat: drop table location mapping support (#8458)

* feat: drop table location mapping support

Disable external metadata locations for S3 Tables and remove the table location
mapping index entirely. Table metadata must live under the table bucket paths,
so lookups no longer use mapping directories.

Changes:
- Remove mapping lookup and cache from bucket path resolution
- Reject metadataLocation in CreateTable and UpdateTable
- Remove mapping helpers and tests

* compile

* refactor

* fix: accept metadataLocation in S3 Tables API requests

We removed the external table location mapping feature, but still need to
accept and store metadataLocation values from clients like Trino. The mapping
feature was an internal implementation detail that mapped external buckets to
internal table paths. The metadataLocation field itself is part of the S3 Tables
API and should be preserved.

* fmt

* fix: handle MetadataLocation in UpdateTable requests

Mirror handleCreateTable behavior by updating metadata.MetadataLocation
when req.MetadataLocation is provided in UpdateTable requests. This ensures
table metadata location can be updated, not just set during creation.

weed/s3api/s3tables/utils.go

@@ -2,7 +2,6 @@ package s3tables
 
 import (
 	"crypto/rand"
-	"crypto/sha1"
 	"encoding/hex"
 	"fmt"
 	"net/url"
@@ -21,8 +20,7 @@ const (
 )
 
 const (
-	tableLocationMappingsDirPath = "/etc/s3tables"
-	tableObjectRootDirName       = ".objects"
+	tableObjectRootDirName = ".objects"
 )
 
 var (
@@ -109,43 +107,6 @@ func GetTableObjectBucketPath(bucketName string) string {
 	return path.Join(GetTableObjectRootDir(), bucketName)
 }
 
-// GetTableLocationMappingDir returns the root path for table location bucket mappings
-func GetTableLocationMappingDir() string {
-	return tableLocationMappingsDirPath
-}
-
-// GetTableLocationMappingPath returns the filer path for a table location bucket mapping
-func GetTableLocationMappingPath(tableLocationBucket string) string {
-	return path.Join(GetTableLocationMappingDir(), tableLocationBucket)
-}
-
-// GetTableLocationMappingEntryPath returns the filer path for a table-specific mapping entry.
-// Each table gets its own entry so multiple tables can share the same external table-location bucket.
-func GetTableLocationMappingEntryPath(tableLocationBucket, tablePath string) string {
-	return path.Join(GetTableLocationMappingPath(tableLocationBucket), tableLocationMappingEntryName(tablePath))
-}
-
-func tableLocationMappingEntryName(tablePath string) string {
-	normalized := path.Clean("/" + strings.TrimSpace(strings.TrimPrefix(tablePath, "/")))
-	sum := sha1.Sum([]byte(normalized))
-	return hex.EncodeToString(sum[:])
-}
-
-func tableBucketPathFromTablePath(tablePath string) (string, bool) {
-	normalized := path.Clean("/" + strings.TrimSpace(strings.TrimPrefix(tablePath, "/")))
-	tablesPrefix := strings.TrimSuffix(TablesPath, "/") + "/"
-	if !strings.HasPrefix(normalized, tablesPrefix) {
-		return "", false
-	}
-
-	remaining := strings.TrimPrefix(normalized, tablesPrefix)
-	bucketName, _, _ := strings.Cut(remaining, "/")
-	if bucketName == "" {
-		return "", false
-	}
-	return path.Join(TablesPath, bucketName), true
-}
-
 // Metadata structures
 
 type tableBucketMetadata struct {
@@ -244,22 +205,6 @@ func ValidateBucketName(name string) error {
 	return validateBucketName(name)
 }
 
-func parseTableLocationBucket(metadataLocation string) (string, bool) {
-	if !strings.HasPrefix(metadataLocation, "s3://") {
-		return "", false
-	}
-	trimmed := strings.TrimPrefix(metadataLocation, "s3://")
-	trimmed = strings.TrimSuffix(trimmed, "/")
-	if trimmed == "" {
-		return "", false
-	}
-	bucket, _, _ := strings.Cut(trimmed, "/")
-	if bucket == "" || !strings.HasSuffix(bucket, "--table-s3") {
-		return "", false
-	}
-	return bucket, true
-}
-
 // BuildBucketARN builds a bucket ARN with the provided region and account ID.
 // If region is empty, the ARN will omit the region field.
 func BuildBucketARN(region, accountID, bucketName string) (string, error) {