merge paru_dev2 into dev2, with major updates to ParU, GraphBLAS, and minor changes to CHOLMOD, SPQR, SPEX, and Example.

[DrTimothyAldenDavis]

May 23, 2024: SuiteSparse version 7.8.0 (DRAFT)

* ParU 1.0.0: first stable release
* CHOLMOD 5.3.0: added cholmod_query, and #define's in cholmod.h,
    to query which Modules and features have been configured.
* GraphBLAS 9.2.0: simpler MATLAB install; sanitize environment variables
* SPQR 4.3.4: changes to reflect updates to CHOLMOD
* SPEX 3.1.1: control Python interface, fix build issues on Mac; this
    will likely be replace with SPEX 3.2.0 with additional updates,
    for SuiteSparse 7.8.0.
* Package versions in this release: (* denotes a new version)
    SuiteSparse_config 7.8.0    *
    AMD 3.3.2
    BTF 2.3.2
    CAMD 3.3.2
    CCOLAMD 3.3.3
    CHOLMOD 5.3.0               *
    COLAMD 3.3.3
    CSparse 4.3.2
    CXSparse 4.4.0
    Example 1.8.0               *
    GraphBLAS 9.2.0             *
    KLU 2.3.3
    LDL 3.3.2
    LAGraph 1.1.3
    SuiteSparse_Mongoose 3.3.3
    ParU 1.0.0                  *
    RBio 4.3.2
    SPEX 3.1.0
    SPQR 4.3.4                  *
    UMFPACK 6.3.3