Add (i)CFG node type annotations + bug fix

[Rot127]

Your checklist for this pull request

• I've read the guidelines for contributing to this repository
• I made sure to follow the project's coding style
• I've documented or updated the documentation of every function and struct this PR changes. If not so I've explained why.
• I've added tests that prove my fix is effective or that my feature works (if possible)
• I've updated the rizin book with the relevant information (if needed)

Detailed description

Fixes the bug that the buffer was not read again, before nodes to RzAnalysisOp.jump/fail were added.

Additionally, and for testing specifically this, annotations are added to the CFG/iCFG nodes.

New annotations:

• None: ○ no-utf8: .
• Cond: ⤹ no-utf8: c
• Entry: ↓ no-utf8: e
• Return: ↑ no-utf8: r
• Call: ⇢ no-utf8: C
• Exit: ⭳ no-utf8: E

Exit is not yet tested, because it is not implemented yet. Exit nodes are nodes which exit the program abnormally, although the procedure should normally return (e.g. call to abort()).

            ;-- ignore_call:
            0x080000c3      push  rbp
            0x080000c4      mov   rbp, rsp
            0x080000c7      call  reloc.target.rand                    ; RELOC 32 rand
            0x080000cc      nop
            0x080000cd      pop   rbp
            0x080000ce      ret

>rizin -Qc 's sym.ignore_call
agF
' test/bins/elf/analysis/x86_cfg_test
┌─────────────────┐
│  0x80000c3 ↓    │
└─────────────────┘
    v
    │
    │
┌─────────────────┐
│  0x80000c4 ○    │
└─────────────────┘
    v
    │
    │
┌─────────────────┐
│  0x80000c7 ⇢    │
└─────────────────┘
    v
    │
    │
┌─────────────────┐
│  0x80000cc ○    │
└─────────────────┘
    v
    │
    │
┌─────────────────┐
│  0x80000cd ○    │
└─────────────────┘
    v
    │
    │
┌─────────────────┐
│  0x80000ce ↑    │
└─────────────────┘

> rizin -Qc 's sym.ignore_call
e scr.utf8=0 ; agF
' test/bins/elf/analysis/x86_cfg_test
.---------------.
|  0x80000c3 e  |
`---------------'
    v
    |
    |
.---------------.
|  0x80000c4 .  |
`---------------'
    v
    |
    |
.---------------.
|  0x80000c7 C  |
`---------------'
    v
    |
    |
.---------------.
|  0x80000cc .  |
`---------------'
    v
    |
    |
.---------------.
|  0x80000cd .  |
`---------------'
    v
    |
    |
.---------------.
|  0x80000ce r  |
`---------------'

Test plan

All green + added

Closing issues

...

[XVilka]

For some reason it fails tests on Windows: https://ci.appveyor.com/project/rizinorg/rizin/builds/49184102/job/s27n8bx7hn9ix46e#L4814

[Rot127]

Blind fix, though I think it was the leak. rz_str_append() frees the pointer for realloc.