Fix vscode error invalid miDebuggerPath for esp32

[mikee47]

The make ide-vscode script generates the default launch.json configuration, containing the following entry:

"miDebuggerPath": "${env:IDF_TOOLS_PATH}/tools/riscv32-esp-elf-gdb/12.1_20231023/riscv32-esp-elf-gdb/bin/riscv32-esp-elf-gdb"

The error occurs where IDF_TOOLS_PATH isn't available in the global environment. There does not appear to be a way to include definitions for environment variables other than within the configuration itself, which renders it pointless. Since IDF_TOOLS_PATH is very unlikely to change we can just use the expanded path:

"miDebuggerPath": "/opt/esp32/tools/riscv32-esp-elf-gdb/12.1_20231023/riscv32-esp-elf-gdb/bin/riscv32-esp-elf-gdb",