Improve libc presence detection (#6170)

**What's the problem this PR addresses?**

On certain Linux distributions, `/usr/bin/ldd` does not contain the
string "GLIBC", but "libc". This is the case in popular distros such as
openSUSE, Amazon Linux, Fedora, RHEL, Arch, and more. On these
distributions, the current version of yarn falls back to
`process.report.getReport()`, which is known to have performance issues
in some instances.

**How did you fix it?**

Add a check for the presence of the value `libc` in addition to the
existing check for `GLIBC`. This allows more Linux users to benefit from
the fast-path that does not rely on `process.report.getReport()`.

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.yarn/versions/99b02b00.yml

@@ -0,0 +1,34 @@
+releases:
+  "@yarnpkg/cli": patch
+  "@yarnpkg/core": patch
+
+declined:
+  - "@yarnpkg/plugin-compat"
+  - "@yarnpkg/plugin-constraints"
+  - "@yarnpkg/plugin-dlx"
+  - "@yarnpkg/plugin-essentials"
+  - "@yarnpkg/plugin-exec"
+  - "@yarnpkg/plugin-file"
+  - "@yarnpkg/plugin-git"
+  - "@yarnpkg/plugin-github"
+  - "@yarnpkg/plugin-http"
+  - "@yarnpkg/plugin-init"
+  - "@yarnpkg/plugin-interactive-tools"
+  - "@yarnpkg/plugin-link"
+  - "@yarnpkg/plugin-nm"
+  - "@yarnpkg/plugin-npm"
+  - "@yarnpkg/plugin-npm-cli"
+  - "@yarnpkg/plugin-pack"
+  - "@yarnpkg/plugin-patch"
+  - "@yarnpkg/plugin-pnp"
+  - "@yarnpkg/plugin-pnpm"
+  - "@yarnpkg/plugin-stage"
+  - "@yarnpkg/plugin-typescript"
+  - "@yarnpkg/plugin-version"
+  - "@yarnpkg/plugin-workspace-tools"
+  - "@yarnpkg/builder"
+  - "@yarnpkg/doctor"
+  - "@yarnpkg/extensions"
+  - "@yarnpkg/nm"
+  - "@yarnpkg/pnpify"
+  - "@yarnpkg/sdks"

packages/yarnpkg-core/sources/nodeUtils.ts

@@ -39,7 +39,7 @@ function getLibc() {
   // Since the getReport can be prohibitely expensive (it also queries DNS which, if misconfigured, can take a long time to timeout),
   // we first check if the ldd binary is glibc or musl, and only then run the getReport() if we can't determine the libc variant.
   if (typeof header !== `undefined`) {
-    if (header && header.includes(`GLIBC`))
+    if (header && (header.includes(`GLIBC`) || header.includes(`libc`)))
       return `glibc`;
     if (header && header.includes(`musl`)) {
       return `musl`;