mpicc: add page and Italian translation (#9966)

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Marco Bonelli <marco@mebeim.net>

pages.it/linux/mpicc.md

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+# mpicc
+
+> Involucro Open MPI per il compilatore di C.
+> Shell che esegue sul compilatore, aggiungono i relevanti argomenti e linkers necessari a compilare/collegare programmi Open MPI, invocando il sottostante compilatore di C per effettuare le effetive operazioni.
+> Maggiori informazioni: <https://www.mpich.org/static/docs/latest/www1/mpicc.html>.
+
+- Compila un file sorgente in un file oggetto:
+
+`mpicc -c {{percorso/del/file.c}}`
+
+- Linka un file oggetto file e genera un eseguibile:
+
+`mpicc -o {{executable}} {{percorso/del/file.o}}`
+
+- Linka e compila i file sorgente in un solo commando:
+
+`mpicc -o {{executable}} {{percorso/del/file.c}}`

pages/linux/mpicc.md

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+# mpicc
+
+> Open MPI C wrapper compiler.
+> The wrappers are simply thin shells on top of a C compiler, they add the relevant compiler and linker flags to the command line that are necessary to compile/link Open MPI programs, and then invoke the underlying C compiler to actually perform the command.
+> More information: <https://www.mpich.org/static/docs/latest/www1/mpicc.html>.
+
+- Compile a source code file into an object file:
+
+`mpicc -c {{path/to/file.c}}`
+
+- Link an object file and make an executable:
+
+`mpicc -o {{executable}} {{path/to/object_file.o}}`
+
+- Compile and link source code in a single command:
+
+`mpicc -o {{executable}} {{path/to/file.c}}`