revert: rollback AHashMap changes and keep using std HashMap (#6741)

* Revert "perf(ecstore): use AHashMap for FileInfo metadata fields (#6738)"

This reverts commit 13a2ae212e.

* fix(filemeta): restore standard HashMap metadata (#6742)

Remove the direct ahash dependency added for FileInfo metadata and revert the affected filemeta/ecstore call sites back to std::collections::HashMap.

Co-authored-by: heihutu <heihutu@gmail.com>

---------

Co-authored-by: heihutu <heihutu@gmail.com>

Cargo.lock

@@ -91,7 +91,6 @@ dependencies = [
  "const-random",
  "getrandom 0.3.4",
  "once_cell",
- "serde",
  "version_check",
  "zerocopy",
 ]
@@ -9627,7 +9626,6 @@ dependencies = [
 name = "rustfs-ecstore"
 version = "1.0.0-rc.4"
 dependencies = [
- "ahash",
  "arc-swap",
  "async-channel",
  "async-recursion",
@@ -9773,7 +9771,6 @@ dependencies = [
 name = "rustfs-filemeta"
 version = "1.0.0-rc.4"
 dependencies = [
- "ahash",
  "arc-swap",
  "byteorder",
  "bytes",