lx_emul: update default linux port to version 6.6.35

[ssumpf]

Our yearly update of dde_linux.

Steps:

• [x] move the old linux.port to _legacylinux.port and update all dependencies
• [x] create new linux.port using a 6.6 kernel
• [x] adjust virt_linux
• [ ] adjust pc_linux
• [ ] adjust a64_linux
• [ ] adjust rpi_linux
• [ ] adjust imx_linux
• [ ] adjust zynq_linux

Known changes:

• kernel_thread takes new char const *name as third argument
• _Generic requires exact return values, for example struct page *pmd_page(pmd_t pmd) cannot be #define pmd_page NULL

[ssumpf]

These commits mark the first three steps. This is a starting point and more testing on all platforms is still required.