Code and scripts to build the SystemReady SR Image
Documentation in README with steps to build the SR Image and verify on
FVP
Move from LuvOS to Linux v5.15 in the ACS Image
Minor enhancements and bugfixes

Signed-off-by: Stuart Yoder <stuart.yoder@arm.com>

 1. Support to build IR ACS live image : build scripts and build instructions in documentation
 2. Upgrading ACS image to v5.13 kernel
 3. Refinement of UEFI-SCT Sequence files for IR and ES and verification
 4. Migrate to the version V21.08.00 of FWTS
 5. BBR: Migrate to edk2-test-stable202108 tag of SCT
 6. General improvements in scripts
 7. Bug Fixes

Co-authored-by: Edhaya Chandran <edhaya.chandran@arm.com>
Co-authored-by: Chetan Rathore <chetan.rathore@arm.com>
Co-authored-by: Jiss Jose <jiss.jose@arm.com>

Signed-off-by: jisjos01 <jiss.jose@arm.com>

Support to build ES ACS live image : build scripts and instructions in documentation
Updated the ES README.md to reflect the changes
Added a common configuration file to set external and internal software versions for build
Upgrading ACS image to v5.11 kernel
Refinement of UEFI-SCT Sequence files for IR and ES and verification
Support for CapsuleApp.efi in build and automation for ES and IR
Migrate to the version V21.06.00 + of FWTS
Migrate to 2821093d6f2b3521c453834f0657cf07c0908155 tag of SCT
General improvements in scripts
Bug Fixes

Co-authored-by: Edhaya Chandran <edhaya.chandran@arm.com>
Co-authored-by: Jeff Booher-Kaeding <jeff.booher-kaeding@arm.com>
Co-authored-by: Jiss Jose <jiss.jose@arm.com>

Signed-off-by: Edhaya Chandran <edhaya.chandran@arm.com>

Signed-off-by: edhay <edhaya.chandran@arm.com>

Scripts and Instructions to build BSA and BBR ACS for SystemReady IR
README for SystemReady ES

Co-authored-by: Edhaya Chandran <edhaya.chandran@arm.com>
Co-authored-by: Jiss Jose <jiss.jose@arm.com>
Co-authored-by: Jeff Booher-Kaeding <jeff.booher-kaeding@arm.com>

Signed-off-by: Edhaya Chandran <edhaya.chandran@arm.com>
Signed-off-by: Gowtham Siddarth <gowtham.siddarth@arm.com>