Extend TemplatedPathPlugin.interpolate to accept `[hash:<digest>:<length>]`
(e.g. `[contenthash:base64:8]`) for filename/path templates, re-encoding the
stored hash into the requested digest. The source hash is already truncated to
output.hashDigestLength, so the result derives from those bytes.

Drop the css-loader-specific localIdentName hash remapping; inline digest and
length are handled generically in TemplatedPathPlugin.interpolate.

Make the localIdent hash-detection regexes suffix-tolerant so [fullhash:N] and
[contenthash:...] trigger hash computation, and pass the output digest into
interpolate so an inline digest on [hash]/[contenthash] re-encodes correctly.

Export getPresentKinds as the single source of truth for which [kind]
placeholders a template references, and route CssGenerator, RuntimePlugin and
SourceMapDevToolPlugin through it instead of their own hand-rolled regexes so
they can't drift from interpolate's grammar.

Re-encoding silently kept the source encoding for a typo'd digest; validate the
requested digest and throw a clear error instead, matching how interpolate
already rejects unimplemented path variables.

Inline-digest path re-encoded the hashDigestLength-truncated hash, capping
entropy below the requested length. Pass the untruncated compilation/chunk hash
(which already exists) so [fullhash:<digest>] and [chunkhash:<digest>] carry full
entropy and match an encode-then-slice result.

RealContentHashPlugin recomputes content hashes in output.hashDigest and would
silently overwrite an inline-digest [contenthash] with a hex hash. Throw a clear
error for that combination instead of emitting the wrong encoding.

The local ident hash uses localIdentHashDigest, not output.hashDigest, so an
inline [fullhash:<digest>] re-encoded from the wrong source. Pass the untruncated
local ident hash and its own digest (fullHashDigest) so interpolate re-encodes it
correctly with full entropy.

The contentHash producers all did nonNumericOnlyHash(hash.digest(d), n); wrap
that composition in one helper and route JavascriptModulesPlugin,
CssModulesPlugin, HtmlModulesPlugin and getLocalIdent through it. AssetGenerator
keeps the inline form since it also returns the untruncated digest.

…dule hash

Fixes issue point 2: the module-context block in interpolate repurposed [hash]
to the module hash, diverging from css-loader. Add a data.hashAsFullHash flag
that getLocalIdent sets so [hash] stays the local ident hash (like [fullhash]);
[modulehash] still yields the module hash. Closes #21141 (point 2).