add testing framework

[PatrickRobbIOL]

Description

This PR adds the Ocre testing framework, along with the first test group (flash validation). The more detailed description of what is being added can be seen in /tests/README.md which is added on one of the commits on this PR.

Type of change

• Test Coverage update

How Has This Been Tested?

I have run this testing framework and the intial test group (the flash validation test group) directly on the Ocre-Runtime GHA agent by SCP'ing my branch over to the host, and running 'bash beginTests.sh flashValidation' which is currently "working," in that the tests are reporting fails since the ocre-runtime currently on the DUT board is reporting errors. I will provide a section from the flash validation test log here for context.

cat /tmp/flashValidation.log 
Beginning test group Flash Validation
Test the Ocre runtime after the flash is complete

Entering Setup...

Script: Flash Validation Setup
==============================

Setup is complete

Entering Testing...

Test Suite: Runtime Validation Tests
====================================

Test Case: Check Runtime Hello World
====================================

**** READING RESPONSE FROM BREAK ****

I: OSPI flash config is OPI / DTR
I: Read SFDP from octoFlash
I: Read SFDP from octoFlash
E: OST wait timed out
I: chip id 0x6b
I: lps22hh@5d: int on gpio@42021800.02
*** Booting Zephyr OS build 7dcd5844296a ***
I: LittleFS version 2.8, disk version 2.1
I: FS at flash-controller@40022000:0x100000 is 32 0x2000-byte blocks with 512 cycle
I: sizes: rd 16 ; pr 16 ; ca 64 ; la 32
E: failed to create directory (-2)
E: ***** USAGE FAULT *****
E:   Illegal load of EXC_RETURN into PC
E: r0/a1:  0x20000c58  r1/a2:  0x08045211  r2/a3:  0x00000040
E: r3/a4:  0x08029baf r12/ip:  0x08029b79 r14/lr:  0x20000c58
E:  xpsr:  0x0803b400
E: Faulting instruction address (r15/pc): 0x00000017
E: >>> ZEPHYR FATAL ERROR 34: Unknown error on CPU 0
E: Current thread: 0x20002760 (shell_uart)
E: Halting system

**** CLOSING CONNECTION ****


TEST FAILED

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes