feat(fileinfo): use AHashMap for metadata fields

- Add ahash dependency to workspace, filemeta, and utils crates
- Change FileInfo.metadata to AHashMap<String, String>
- Change ObjectPartInfo.checksums to Option<AHashMap<String, String>>
- Change MetaObjectV1.meta to AHashMap<String, String>
- Change MetaObjectV1Part.checksums to Option<AHashMap<String, String>>
- Change UniquePartChecksums to use AHashMap
- Make metadata_compat functions generic over BuildHasher
- Make get_internal_replication_state generic over BuildHasher

This optimization replaces the standard library's SipHash with ahash,
which provides 2-3x faster hashing for typical key types.

Refs: https://github.com/rustfs/backlog/issues/2005

Co-Authored-By: heihutu <heihutu@gmail.com>

Cargo.lock

@@ -91,6 +91,7 @@ dependencies = [
  "const-random",
  "getrandom 0.3.4",
  "once_cell",
+ "serde",
  "version_check",
  "zerocopy",
 ]
@@ -9716,6 +9717,7 @@ dependencies = [
 name = "rustfs-filemeta"
 version = "1.0.0-rc.3"
 dependencies = [
+ "ahash",
  "arc-swap",
  "byteorder",
  "bytes",
@@ -10751,6 +10753,7 @@ dependencies = [
 name = "rustfs-utils"
 version = "1.0.0-rc.3"
 dependencies = [
+ "ahash",
  "base64-simd",
  "blake2",
  "brotli",