libsecret: enable TPM support

[illdefined]

libsecret supports binding the encryption key used for the file backend to a TPM, which offers security benefits over just deriving it from the user’s login password: https://gnome.pages.gitlab.gnome.org/libsecret/libsecret-tpm2.html

This change adds the option withTpm2Tss to enable building with TPM support. I suggest to enable it by default on x86-64 considering the almost universal prevalence of TPMs on x86-64 desktop systems.

The option abrmdSupport is used to enable support for the user‐space TPM resource manager. When enabled, libtss2-tcti-tabrmd.so and libtss2-tcti-device.so are added to the library’s dependencies to enable loading at run‐time.

libsecret requires a TPM resource manager, but works fine with the kernel‐space resource manager (/dev/tpmrm0). When using an emulated TPM (swtpm), a user‐space resource manager (abrmd) has to be used.

Things done

I tested this change on nixpkgs master.

The package tests run successfully and I manually tested secret-tool using the hardware TPM of my computer (NixOS x86-64) and the kernel‐space resource manager.

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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