ci: Update RISC-V toolchain to support rv32imc multilib

Add the Ubuntu Noble repository to the CI workflows to install a newer version of gcc-riscv64-unknown-elf (GCC 13+). This version includes the rv32imc/ilp32 multilib configuration required by the updated picolibc build.

Signed-off-by: Miguel Osorio <miguelosorio@google.com>

Author: moidx

.github/workflows/test-openocd.yml

@@ -24,6 +24,7 @@ jobs:
     steps:
       - name: Install utils
         run: |
+          echo "deb http://archive.ubuntu.com/ubuntu/ noble main universe" | sudo tee -a /etc/apt/sources.list > /dev/null
           sudo apt -qqy update && sudo apt -qqy --no-install-recommends install \
              ccache ninja-build gcc-riscv64-unknown-elf
           pip3 install meson

.github/workflows/test-regression-cache-waypack.yml

@@ -54,6 +54,7 @@ jobs:
     steps:
       - name: Install utils
         run: |
+          echo "deb http://archive.ubuntu.com/ubuntu/ noble main universe" | sudo tee -a /etc/apt/sources.list > /dev/null
           sudo apt -qqy update && sudo apt -qqy --no-install-recommends install \
             git python3 python3-pip build-essential ninja-build ccache \
             gcc-riscv64-unknown-elf

.github/workflows/test-regression-dcls.yml

@@ -52,6 +52,7 @@ jobs:
     steps:
       - name: Install utils
         run: |
+          echo "deb http://archive.ubuntu.com/ubuntu/ noble main universe" | sudo tee -a /etc/apt/sources.list > /dev/null
           sudo apt -qqy update && sudo apt -qqy --no-install-recommends install \
             git python3 python3-pip build-essential ninja-build ccache \
             gcc-riscv64-unknown-elf

.github/workflows/test-regression-exceptions.yml

@@ -30,6 +30,7 @@ jobs:
     steps:
       - name: Install utils
         run: |
+          echo "deb http://archive.ubuntu.com/ubuntu/ noble main universe" | sudo tee -a /etc/apt/sources.list > /dev/null
           sudo apt -qqy update && sudo apt -qqy --no-install-recommends install \
             git python3 python3-pip build-essential ninja-build ccache \
             gcc-riscv64-unknown-elf

.github/workflows/test-renode.yml

@@ -19,6 +19,7 @@ jobs:
 
       - name: Install dependencies
         run: |
+          echo "deb http://archive.ubuntu.com/ubuntu/ noble main universe" | sudo tee -a /etc/apt/sources.list > /dev/null
           sudo apt -qqy update && sudo apt -qqy --no-install-recommends install \
             git python3 python3-pip build-essential ninja-build ccache \
             gcc-riscv64-unknown-elf

.github/workflows/test-uarch.yml

@@ -106,6 +106,7 @@ jobs:
 
       - name: Install prerequisites
         run: |
+          echo "deb http://archive.ubuntu.com/ubuntu/ noble main universe" | sudo tee -a /etc/apt/sources.list > /dev/null
           sudo apt -qqy update && sudo apt -qqy --no-install-recommends install \
             autoconf automake autotools-dev \
             bc bison build-essential \

.github/workflows/test-verification.yml

@@ -35,6 +35,7 @@ jobs:
 
       - name: Install prerequisities
         run: |
+          echo "deb http://archive.ubuntu.com/ubuntu/ noble main universe" | sudo tee -a /etc/apt/sources.list > /dev/null
           sudo apt -qqy update && sudo apt -qqy --no-install-recommends install \
             autoconf automake autotools-dev \
             bc bison build-essential \