fix sampler info packing

[star-e]

Increase anisotropic filter value from 0-15 to 0-16. (4bits to 5bits)
Fix sampler info unpacking algorithm.
Add static tests of pack/unpack functions.

#17723

Changelog

---

Continuous Integration

This pull request:

• needs automatic test cases check.

  Manual trigger with @cocos-robot run test cases afterward.

• does not change any runtime related code or build configuration

  If any reviewer thinks the CI checks are needed, please uncheck this option, then close and reopen the issue.

---

Compatibility Check

This pull request:

• changes public API, and have ensured backward compatibility with deprecated features.
• affects platform compatibility, e.g. system version, browser version, platform sdk version, platform toolchain, language version, hardware compatibility etc.
• affects file structure of the build package or build configuration which requires user project upgrade.
• introduces breaking changes, please list all changes, affected features and the scope of violation.

[github-actions]

Interface Check Report

! WARNING this pull request has changed these public interfaces:

@@ -7975,9 +7975,9 @@
             get hash(): number;
             protected _info$: SamplerInfo;
             protected _hash$: number;
             constructor(info: Readonly<SamplerInfo>, hash: number);
-            static computeHash(info: Readonly<SamplerInfo>): Filter;
+            static computeHash(info: Readonly<SamplerInfo>): number;
             static unpackFromHash(hash: number): SamplerInfo;
         }
         export class SamplerInfo {
             minFilter: Filter;
@@ -60561,9 +60561,9 @@
             setMipFilter(mipFilter: _cocos_asset_assets_asset_enum__TextureFilter): void;
             /**
              * @en Sets the texture's anisotropy.
              * @zh 设置此贴图的各向异性。
-             * @param anisotropy @en The anisotropy to be set. @zh 待设置的各向异性数值。
+             * @param anisotropy @en The anisotropy to be set. Max value is 16. @zh 待设置的各向异性数值。最大值为16
              */
             setAnisotropy(anisotropy: number): void;
             /**
              * @en Destroy the current texture, clear up the related GPU resources.

[star-e]

Increase maxAnisotropy from 4 bits to 5 bits (0-15 to 0-16)

[star-e]

Increase maxAnisotropy from 4 bits to 5 bits (0-15 to 0-16)

[star-e]

@cocos-robot run test cases