Implement basic rand()

[srickardti]

Disabled shadowing of the FreeRTOS config by the DMM header.
Implemented a basic PRNG for ctor startup.

The global initialization of the global message counter struct in
src/transport/MessageCounter.h results in a call to the C standard library
function rand() from a C++ ctor. This results in a call to pvPortMalloc,
causing a hard fault with the current buffer implementation.

Problem

rand() is called before main() so the calls to allocate a reent struct fail.

Summary of Changes

Added a basic non-reent PRNG for the TI platform.

Fixes #6997

Testing

Manually tested with an LP_CC2652R7. Execution was traced from the ResetISR to main with CCS and the device was left to free run. log output was viewed on the debug UART connection and the processor was halted in the power idle loop.

[github-actions]

Size increase report for "esp32-example-build" from fb7cd0f

File	Section	File	VM
chip-all-clusters-app.elf	.flash.text	24	24
chip-all-clusters-app.elf	.flash.rodata	-4	-4

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-all-clusters-app.elf and ./pull_artifact/chip-all-clusters-app.elf:

sections,vmsize,filesize
.xt.lit._ZN12QRCodeScreenD5Ev,0,88
.xt.prop._ZN12QRCodeScreenD5Ev,0,52
.xt.prop._ZN4chip9Transport16AdminPairingInfo5ResetEv,0,40
.flash.text,24,24
[Unmapped],0,4
.flash.rodata,-4,-4
.xt.prop._ZN4chip8Platform3NewINS_9Transport16AdminPairingInfo24StorableAdminPairingInfoEJEEEPT_DpOT0_,0,-12
.xt.prop._ZNSt6vectorIhSaIhEE17_M_default_appendEj,0,-40
.xt.lit._ZN4chip8Platform3NewINS_9Transport16AdminPairingInfo24StorableAdminPairingInfoEJEEEPT_DpOT0_,0,-48
.xt.lit._ZNSt6vectorIhSaIhEE17_M_default_appendEj,0,-80

Comparing ./master_artifact/chip-pigweed-app.elf and ./pull_artifact/chip-pigweed-app.elf:

sections,vmsize,filesize

[woody-apple]

Thanks for the change! We have updated our PR template, requesting changes to conform to the PR template:

#### Problem
What is being fixed?  Examples:
* Fix crash on startup
* Fixes #12345 Frobnozzle is leaky (exactly like that, so GitHub will auto-close the issue).

#### Change overview
What's in this PR

#### Testing
How was this tested? (at least one bullet point required)
* If unit tests were added, how do they cover this issue?
* If unit tests existed, how were they fixed/modified to prevent this in future?
* If new unit tests are not added, why not?
* If integration tests were added, how do they verify this change?
* If new integration tests are not added, why not?
* If manually tested, what platforms controller and device platforms were manually tested, and how?
* If no testing is required, why not?

[srickardti]

Thanks for the change! We have updated our PR template, requesting changes to conform to the PR template:

Apologies, I must have gotten it in before the template was update. I've included the testing information now.

[woody-apple]

No apologies needed, the template is new :) Thanks!