Enable pc file dependencies

Downloaded and extracted 1,030 .pc files from wolfi (base on 24th
September file listing of all packages from @dustin).

Executing `pkgconf --exist` on them revieled that 57 of them declare
dependencies that do not, in fact exist.

It is safe to turn pc: depends, as for vast majority of packages they
will work correctly.

For the 57 broken ones, there is now test/pkgconf pipeline, and one
genuinely has to fix those. By either packaging libraries that are
declared as required, ensuring those dependant libraries ship
pkgconfig file, or patch/remove said broken pkgconfig file.

Out of the sample of 1,030 .pc files, the 788 of them do have
requirements declared. Thus they will need rebuilds to gain the
correct dependencies. These however are in just 469 binary packages,
some of which come from the same origin. Thus roughly at most 400 or
so origins to rebuild.

Furthermore wolfi pre-submit, install apk check will catch the broken
-dev packages that cannot be installed.

With this feature enabled, build log has:

```
2024/09/27 23:44:24 INFO scanning for pkg-config data...
2024/09/27 23:44:24 INFO   found pkg-config libarchive for usr/lib/pkgconfig/libarchive.pc
...
2024/09/27 23:44:24 INFO   found pkg-config dependency (requires private) libcrypto for usr/lib/pkgconfig/libarchive.pc
...
2024/09/27 23:44:24 INFO   runtime:
2024/09/27 23:44:24 INFO     bzip2-dev
2024/09/27 23:44:24 INFO     lz4-dev
...
2024/09/27 23:44:24 INFO     pc:libcrypto
...
2024/09/27 23:44:24 INFO     so:libarchive.so.13
2024/09/27 23:44:24 INFO     xz-dev
2024/09/27 23:44:24 INFO     zlib-dev
2024/09/27 23:44:24 INFO     zstd-dev
2024/09/27 23:44:24 INFO   provides:
2024/09/27 23:44:24 INFO     pc:libarchive=3.7.6-r0
```

These extra new dependency generated `pc:libcrypto` which upon
installing libarchive-dev allows one to use it straight away for both
dynamic and static linking.

Note all of our public pc files already generated provides:

```
$ apk info --provides openssl-dev
openssl-dev-3.3.2-r0 provides:
pc:libcrypto=3.3.2
pc:libssl=3.3.2
pc:openssl=3.3.2
```

pkg/sca/sca.go

@@ -380,8 +380,10 @@ func generateSharedObjectNameDeps(ctx context.Context, hdl SCAHandle, generated
 	return nil
 }
 
-// TODO(kaniini): Turn this feature on once enough of Wolfi is built with provider data.
-var generateRuntimePkgConfigDeps = false
+// TODO(xnox): Note remove this feature flag, once successful
+// note this can generate depends on pc: files that do not exist in
+// wolfi, however package install tests will catch that in presubmit
+var generateRuntimePkgConfigDeps = true
 
 // generatePkgConfigDeps generates a list of provided pkg-config package names and versions,
 // as well as dependency relationships.