ROCm restructuring (#2521)

Flattened out page structure for improved navigability.
 * Change Table of Contents 
 * Update the install guides for windows and linux
 * Removed extraneous index pages
 * GPU architecture pages duplicate entries removed
 * spack page cleanup

---------

Co-authored-by: Sam Wu <samwu103@amd.com>
Co-authored-by: Saad Rahim (AMD) <44449863+saadrahim@users.noreply.github.com>

docs/how-to/tuning-guides/mi100.md

@@ -358,11 +358,11 @@ installed.
 ## System management
 
 For a complete guide on how to install/manage/uninstall ROCm on Linux, refer to
-[Installing ROCm on Linux](../../tutorials/install/linux/index). For verifying that the
+[Installing ROCm on Linux](../../install/linux/install.md). For verifying that the
 installation was successful, refer to
 {ref}`verifying-kernel-mode-driver-installation` and
-[Validation Tools](../../reference/compilers-tools/validation-tools). Should verification
-fail, consult the [System Debugging Guide](../system-debugging).
+[Validation Tools](../../reference/library-index.md). Should verification
+fail, consult the [System Debugging Guide](../system-debugging.md).
 
 (mi100-hw-verification)=
 
@@ -400,7 +400,7 @@ The previous command shows the system structure in four blocks:
 To query the compute capabilities of the GPU devices, the `rocminfo` command is
 available with the AMD ROCm™ platform. It lists specific details about the GPU
 devices, including but not limited to the number of compute units, width of the
-SIMD pipelines, memory information, and instruction set architecture:
+SIMD pipelines, memory information, and Instruction Set Architecture:
 
 ![rocminfo output fragment on an 8*MI100 system](../../data/how-to/tuning-guides/tuning003.png "rocminfo output fragment on an 8*MI100 system")