gnu: biber -> texlive-biber.

Build from sources provided by TeX Live distribution, so they always match
BibLaTeX version.

* gnu/packages/patches/biber-adapt-perl-5.36.patch: Delete file.
* gnu/local.mk: Apply removal.
* gnu/packages/tex.scm (texlive-biber): New variable.
(biber): Deprecate variable.
(perl-text-bibtex): Move from here...
* gnu/packages/perl.scm (perl-text-bibtex): ... to here.

gnu/packages/perl.scm

@@ -10631,6 +10631,46 @@ used to justify strings to various alignment styles.")
 text sequences from strings.")
     (license (package-license perl))))
 
+(define-public perl-text-bibtex
+  (package
+    (name "perl-text-bibtex")
+    (version "0.88")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "mirror://cpan/authors/id/A/AM/AMBS/Text-BibTeX-"
+                           version ".tar.gz"))
+       (sha256
+        (base32
+         "0b7lmjvfmypps1nw6nsdikgaakm0n0g4186glaqazg5xd1p5h55h"))))
+    (build-system perl-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'add-output-directory-to-rpath
+           (lambda* (#:key outputs #:allow-other-keys)
+             (substitute* "inc/MyBuilder.pm"
+               (("-Lbtparse" line)
+                (string-append "-Wl,-rpath="
+                               (assoc-ref outputs "out") "/lib " line)))
+             #t))
+         (add-after 'unpack 'install-libraries-to-/lib
+           (lambda* (#:key outputs #:allow-other-keys)
+             (substitute* "Build.PL"
+               (("lib64") "lib"))
+             #t)))))
+    (native-inputs
+     (list perl-capture-tiny perl-config-autoconf perl-extutils-libbuilder
+           perl-module-build))
+    (home-page "https://metacpan.org/release/Text-BibTeX")
+    (synopsis "Interface to read and parse BibTeX files")
+    (description "@code{Text::BibTeX} is a Perl library for reading, parsing,
+and processing BibTeX files.  @code{Text::BibTeX} gives you access to the data
+at many different levels: you may work with BibTeX entries as simple field to
+string mappings, or get at the original form of the data as a list of simple
+values (strings, macros, or numbers) pasted together.")
+    (license license:perl-license)))
+
 (define-public perl-text-charwidth
   (package
     (name "perl-text-charwidth")