update IAR CM3 port to avoid including FreeRTOSConfig.h in portasm.s

[lcp5y3]

IAR CM3 port update

Description

1. I create a global variable in port.c named portConfigMaxSyscallIntPriority to store the value defined
   by configMax_SYSCALL_INTERRUPT_PRIORITY in FreeRTOSConfig.h

2. In portasm.s I removed include of *FreeRTOSConfig.h", add an external to portConfigMaxSyscallIntPriority and
   replace mov r0, #configMax_SYSCALL_INTERRUPT_PRIORITY by ldr r0, =portConfigMaxSyscallIntPriority

This modification allow us to add #include <assert.h> in FreeRTOSConfig.h and redfining configAssert( x ) with our assert definition.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.61%. Comparing base (31dd1e3) to head (5b67935).
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1222      +/-   ##
==========================================
- Coverage   91.64%   91.61%   -0.03%     
==========================================
  Files           6        6              
  Lines        3254     3257       +3     
  Branches      903      901       -2     
==========================================
+ Hits         2982     2984       +2     
  Misses        132      132              
- Partials      140      141       +1     

Flag	Coverage Δ
unittests	91.61% <ø> (-0.03%)	⬇️

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[aggarg]

You can include assert.h and define configASSERT by putting it in __ICCARM___ guard like the following - https://github.com/FreeRTOS/FreeRTOS/blob/main/FreeRTOS/Demo/CORTEX_MPU_M7_NUCLEO_H743ZI2_GCC_IAR_Keil/Config/FreeRTOSConfig.h#L43.

[lcp5y3]

@aggarg Thank's for this solution.